(Loose) uRPF vs. non-announced IXP space

[Brian E Carpenter]

On 2012-02-09 01:35, Stefan Neufeind wrote:
...
>>>  From my point of view RFC 5963 should be updated to recommend the 
>>> global announcement
>>> of IX prefixes for IPv6 or - as already mentioned - an alternative would 
>>> be to source the
>>> ICMP messages from a public address instead.
>> Vendors providing uRPF implementations that cannot be configured to
>> add exceptions, like "permit all ICMP packet too big" are part of the
>> problem.

It isn't just uRPF - we had a similar discussion about ICMP PTB with
a link-local source, which any router should drop according to
the standards.

Surely the only safe solution is to ensure that every ICMP PTB (or echo reply)
has a valid globally routable source addr.

   Brian